The speed of sound in water is four times its speed in air. When a sound wave of frequency 'n' and wavelength 'λ' enters from air into water, then its frequency and wavelength will respectively become -

The speed of sound in water is four times its speed in air. When a sou

1.	The speed of sound in water is four times its speed in air. When a sound wave of frequency 'n' and wavelength 'λ' enters from air into water, then its frequency and wavelength will respectively become -
A.	4n and λ
B.	n and 4λ
C.	2n and λ
D.	None of these
Answer» C. 2n and λ